Comparison

ActivTrax vs Sproutkin

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ActivTrax

This app personalizes your gym workouts by predicting and prescribing the exact weight to lift on every piece of equipment. It offers customized routines, exercise instructions, and progress tracking, making your gym visits efficient and varied.

Highlights
  • Predicts and prescribes exact weight for gym equipment
  • Customized resistance routines
  • Exercise instructions and videos
  • Wearable device integration
  • Progress reports
  • Nutritional database and food journaling
  • Cardio tracking
Features
Read full description

The ONLY weight training app that predicts and prescribes the right amount of weight you should use on every piece of equipment at your gym. No more guessing or feeling lost at the gym! ActivTrax is available only at participating gyms and uses the actual equipment available to build a completely personalized exercise experience. While other apps create generic, pre-defined workouts, ActivTrax is the only fitness tool that accurately prescribes and predicts the exact amount of weight to lift on every set for every piece of fitness equipment at your gym. How do we know others can't do it? We own the patent! * Customized resistance routines built around your wants, needs & goals * Accurate weight prescription for every exercise at your gym * No two visits to the gym are the same -- the amount of exercise variety is based on your experience level * Exercise instructions and videos illustrate proper form and technique * Connect your favorite wearable device to track your steps * Our desktop interface provides insightful progress reports * Comprehensive nutritional database * Food journaling and cardio tracking We make navigating your gym easy by telling you which equipment to use, what exercises to perform, how much weight to lift and even the amount of rest time between sets -- it's all done for you and the routines change with each and every visit to the gym to keep your workouts interesting. Your performance is automatically analyzed after each workout and any necessary changes are made to ensure you continue to make progress and reach your goals. And, if you're looking to lose weight, our nutrition tracking and food planning tool allows you to easily record and monitor your caloric balance to help get you to your goal weight. But all of this is only possible if your gym participates.

About

Sproutkin

This app helps new parents track baby activities like feeding, sleep, and diaper changes with a simple, private interface. It allows co-parents to merge logs without cloud accounts and provides insights into sleep patterns and consumable supplies.

Highlights
  • Log feeds, sleep, diapers, vitamins, baths, walks, tummy time
  • Customizable activity tracking
  • Co-parent log merging without cloud accounts
  • Detailed feed tracking with side memory
  • Sleep analytics: total sleep, estimated bedtime, night stretches
  • Consumables tracking for supplies
  • Customizable reminders
Features
Read full description

Sproutkin is a simple, private baby activity tracker built for new parents who want to stay organized without signing up for another account or handing their data to the cloud. TRACK WHAT MATTERS, IN ONE TAP Log feeds (breast, bottle, formula, or solid food), sleep, diapers, vitamins, baths, walks, tummy time, and temperature — plus any custom activity you define. Durational activities like sleep start a timer on tap and stop it on the next tap. SHARE WITH YOUR CO-PARENT, NO CLOUD NEEDED Sproutkin lets multiple caregivers merge logs without any account. Export a .sproutkin file and share it with your partner however you like — AirDrop, iMessage, email. Their app merges it in; both logs stay up to date. FEED TRACKING THAT REMEMBERS THE DETAILS Log nursing sessions and Sproutkin remembers which side was last used, so whoever picks up the next feed always knows where to start. Log solid foods by name and mark any reactions; the Analytics tab keeps a full history of every food introduced and any that caused a response. SLEEP ANALYTICS THAT GO DEEPER Three dedicated sleep cards: total sleep per day, estimated bedtime (derived from your logged sessions), and night stretches — so you can see at a glance whether sleep is consolidating into longer blocks. Customize which analytics cards appear and drag them to your preferred order. SUPPLIES, NOT JUST ACTIVITIES Track when you open a new can of formula, a diaper pack, or wipes. The Consumables tab shows how long your current container has been open and the average lifespan of past ones — a practical heads-up for when to reorder. REMINDERS Set notifications for any activity — a daily vitamin reminder, a feeding window, anything you need. No account required; uses your device's notification system. YOUR DATA STAYS ON YOUR DEVICE Everything is stored locally using Apple's SwiftData framework. No cloud sync, no analytics SDKs, no ads, no subscription. Back up or share your data at any time via a .sproutkin export from Settings.

Screenshots

ActivTrax4 screens
Sproutkin4 screens

Verdict

The call

The clearest difference is rating: Sproutkin at 5.0 against ActivTrax's 2.3. Sproutkin also leads on update cadence (every 6 days vs every 5 weeks). ActivTrax's advantage is ratings volume (152 vs 1) and iOS requirement (14.0 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sproutkin holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: ActivTrax has 152 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

ActivTrax ships an update every 5 weeks, Sproutkin every 6 days. The most recent releases landed on October 16, 2026 and October 1, 2026 respectively.

Scorecard4 real differences · 6 level
ActivTrax versus Sproutkin: the parameters behind the verdict, then further details
ParameterActivTraxSproutkin
PriceFreeFree
Rating2.3 (152 ratings)5.0 (1 ratings) — better
Positive reviews10.5% of reviews—
Number of ratings152 — better1
Update frequencyEvery 5 weeksEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better18.0
Further details — not scored
Size20 MB4 MB
Age rating4+4+
DeveloperActivTraxAddison Chung

Customer experience

ActivTrax

All ratings152 ratings
Positive21.7%
Neutral13.8%
Negative64.5%
Written reviews86 reviews
Positive10.5%
Neutral15.1%
Negative74.4%

Sproutkin

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

ActivTrax

Reported bugs

16 issues
  • App crashes when submitting workouts
  • Cannot connect to servers reliably
  • Weight changes don't save or revert automatically
  • Unexpected logouts during workouts
  • All workout data lost when app closes
Show 11 more
  • Exercise videos fail to load or play
  • Music player interference when opening videos
  • Duplicate exercises in generated workouts
  • Unable to add additional sets or exercises
  • App hangs and requires force restart
  • Login failures despite correct credentials
  • Date/time display errors
  • Equipment numbers don't match gym layout
  • Food journal navigation trap (no exit option)
  • Inconsistent weight recommendations
  • App freezes when changing exercise types

Requested features

14 requests
  • Timer for rest periods between sets
  • Apple Watch and Apple Health integration
  • Ability to add custom exercises and sets on-the-fly
  • Save machine position preferences
  • Partner/group workout mode
Show 9 more
  • Workout history and analytics dashboard
  • Direct feedback mechanism to developers
  • Ability to substitute exercises
  • Improved weight prediction algorithm
  • Numeric keypad for rep entry instead of scrolling
  • Video format updates with sound
  • Sync with other fitness apps (Fitbod, etc.)
  • Nutrition tracking improvements
  • Offline workout access

Sproutkin

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ActivTrax

No in-app purchases

None

Sproutkin

No in-app purchases

Questions

Is ActivTrax free?
ActivTrax is free to download, with no in-app purchases.
Is Sproutkin free?
Sproutkin is free to download, with no in-app purchases.
Which has better reviews, ActivTrax or Sproutkin?
Sproutkin is rated higher. ActivTrax averages 2.3 out of 5 from 152 ratings, while Sproutkin averages 5.0 from 1 ratings.
Do ActivTrax or Sproutkin have ads?
Neither ActivTrax nor Sproutkin shows ads.
Which is updated more often, ActivTrax or Sproutkin?
ActivTrax ships an update every 5 weeks, and Sproutkin every 6 days. Most recently, ActivTrax was updated on October 16, 2026 and Sproutkin on October 1, 2026.

Other comparisons